English
At present, there are many brands of uPVC Door in the market, good and bad. Plastic uPVC Door is also divided into three to six or nine grades. Inferior plastic steel doors and windows are flooded with the temptation of their prices. So when you buy uPVC Door, you must ask more and compare, don't just pay attention to the appearance color.
The appearance color of uPVC Door should be bluish-white, the color is too white or gray, indicating that the stable composition in the material is not enough, and it is easy to age and turn yellow over time; the surface should be smooth and flat without cracking.
Special steel linings should be embedded in door and window frames and fan profiles. The sealing strip should be flat, without crimping, no grooving, and odorless. The hardware is flexible and smooth; the auxiliary materials such as the bead and seal of the plastic steel door and window should be matched with the main profile. Good plastic-steel doors and windows will not be aging or deformed in the outdoor wind and sun for 30 to 50 years; while the color is pure white or yellow in white is relatively inferior, so the color sun protection ability is poor, and it will change after several years of use The more yellow it becomes until it is aged, deformed, and brittle, the reason is that there is too much calcium in the profile formula.
The drainage grooves and air pressure balance holes are processed in staggered positions to avoid direct entry of cold wind and dust. The drainage holes of the plastic-steel windows that are assembled tightly are equipped with airtight covers to prevent rainwater from flowing into the room from the holes; glass is used for plastic-steel doors and windows. It should be flat, free of water marks, firmly installed, not in direct contact with the plastic profile, and sealed bead close to the gap. If it is a double-glass interlayer, there should be no dust and moisture in the interlayer; there should be aluminum slide rails under the sliding window frame to facilitate its replacement. In general, double pulleys are better than single pulleys.
Therefore, everyone must pay attention to the above points when purchasing uPVC Door, and don't be confused by the appearance of inferior doors and windows.
